auronandace
31 lines
888 B
Rust
31 lines
888 B
Rust
//! `sys/file.h` implementation.
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//!
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//! Non-POSIX, see <https://man7.org/linux/man-pages/man2/flock.2.html>.
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use crate::{
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error::ResultExt,
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platform::{Pal, Sys, types::c_int},
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};
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/// Place a shared lock.
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pub const LOCK_SH: c_int = 1;
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/// Place an exclusive lock.
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pub const LOCK_EX: c_int = 2;
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/// To make a nonblocking request, include `LOCK_NB` (by ORing) with any of
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/// `LOCK_SH`, `LOCK_EX` and `LOCK_UN`.
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pub const LOCK_NB: c_int = 4;
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/// Remove an existing lock held by this process.
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pub const LOCK_UN: c_int = 8;
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pub const L_SET: c_int = 0;
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pub const L_INCR: c_int = 1;
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pub const L_XTND: c_int = 2;
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/// See <https://man7.org/linux/man-pages/man2/flock.2.html>.
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///
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/// Apply or remove an advisory lock on an open file.
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#[unsafe(no_mangle)]
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pub extern "C" fn flock(fd: c_int, operation: c_int) -> c_int {
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Sys::flock(fd, operation).map(|()| 0).or_minus_one_errno()
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}
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